Physicists REVERSE time using Quantum Computer — Time Travel BREAKTHROUGH

Rodiano Bonacci
Marzo 14, 2019

Researchers from the Moscow Institute of Physics and Technology, helped by colleagues in Switzerland and the USA, expect the technique to become more efficient.

Scientists at the Moscow Institute of Physics and Technology in collaboration with the scientists from the US and Switzerland have returned the state of a quantum computer a fraction of a second into the past.

But the universe does have one rule that goes only in one way: the second law of thermodynamics, which describes the progression from order to disorder. According to many laws of physics, there is no past and future. The scientists' experiment challenged the second law of thermodynamics, which dictates the direction of events from the past to the future and involves the transition of energy within a system from usable to unusable, The Daily Mail reported.

"We have artificially created a state that evolves in a direction opposite to that of the thermodynamic arrow of time", said Lesovik. "In spite of the fact that it sees no difference amongst the future and the past, the region of space containing the electron will spread out all around rapidly".

Study co-author Andrey Lebedev from MIPT and ETH Zurich said, "Suppose the electron is localized when we begin observing it".

The second law of thermodynamics posits that an isolated system can only remain static or evolve toward a state of chaos.

The physicist explains that the evolution of the electron state is governed by Schrödinger's equation. This highly ordered configuration corresponds to an electron localized in a small region, or a rack of billiard balls before the break.

"However, Schrödinger's equation is reversible", adds Valerii Vinokur, a co-author of the paper, from the Argonne National Laboratory, U.S.

Researchers crunched the numbers and found that if 10 billion freshly localized electrons were observed every second for the entirety of the universe's lifetime, 13.7 billion years, only one particle would be observed reversing time - spontaneously localizing against the arrow of time.

An electron's physical position is defined by uncertainty, meaning that instead of being a concrete "point" it is a fuzzy state of probabilities smeared across a region of space.

Scientists then set out to ascertain the likelihood to observe an electron "smeared out" over a small amount of a second immediately localizing into its recent past.

Qubits are units of information which are described by a "one", a "zero", or a mixed "superposition" of both states.

Other quantum computing experts said: "I don't know how useful this is...it doesn't mean these guys made a time machine".

As Scott Aaronson, director of the Quantum Information Center at the University of Texas at Austin, says, "if you're simulating a time-reversible process on your computer, then you can "reverse the direction of time" by simply reversing the direction of your simulation".

Stage 2: Degradation. The order is lost.

The scientists found that, working with just two qubits, "time reversal" was achieved with a success rate of 85%. For the experiment, the scientists used an "evolution program" that would impact "qubits", also known as quantum bits.

In the experiment, an "evolution program" was launched which caused the qubits to become an increasingly complex changing pattern of zeros and ones.

The scientists then ran a different program, which tells the computer to run "backward".

However, the success rate plunged to 50 percent when three qubits were present.

The error rate is expected to drop as scientists improve the devices used to be more sophisticated, the researchers behind the discovery said.

"Another fundamental question is whether it is possible at all to design a quantum algorithm that would perform time-reversal more efficiently".

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